Make AttributedMetaModel lazily look up MetaTables and MetaFunctions.
Make AttributedMetaModel lazily look up MetaTables and MetaFunctions.

This *greatly* speeds up DataContext construction, 
from ~350000 ticks down to 400 ticks (_wow_!).


git-svn-id: 1800f71f313d917366f95485fa960eed04b40598@1171 33146b6e-df29-0410-a1ca-39be37fb9416

sharique/dbinq,sharique/dbinq,Sectoid/dblinq,Sectoid/dblinq